lab-rv32i-c-gpio-edges-debounce/crt0.S

  .text
  .global _start
  .type _start, @function

_start:
.option push
.option norelax
  la gp, __global_pointer$
.option pop

  # common/init.S installed sp and mtvec before entering this startup.
  la a0, __bss_start
  la a1, __bss_end
1:
  bgeu a0, a1, 2f
  sb zero, 0(a0)
  addi a0, a0, 1
  j 1b
2:
  call main
  tail _exit

  .size _start, .-_start